Electrical conduit and box.



No. 680,254. Patented Aug. l3, I90l.

H. KRANTZ.

ELECTRICAL counun AND BOX.

[Ayplication filed Mny 3, 1901.)

(No Model.)

INVENTOH HUBfRT KRHNTZ BY c/fiMfln LW Hi6 ATTOHNEYuS.

mu was wsvzns co. uoroumq, WASHINGTON. 11c.

UNITED STATES PATENT OFFICE.

HUBERT KRANTZ, OF BROOKLYN, NEW YORK.

ELECTRICAL CONDUIT AND BOX.

SPECIFICATION forming part of Letters Patent No. 680,254, dated August13, 1901.

Application filed May 3, 1901.

To aZZ- whom, it may concern.-

Be it known that I, HUBERT KRANTZ, a citizen of the United States ofAmerica, residing in the borough of Brooklyn, in the county of Kings,State of New York, have invented Improvements in Electrical Conduits andBoxes, of which the following is a specification.

The main object of my invention is to make the connections of electricalconduit-pipes and outlet-boxes more simple and convenient. This object Iattain in the manner which I- will now describe, reference being had tothe accompanying drawings, in which- Figure 1 is a vertical sectionthrough an outlet-box and the ends of two conduit-pipes connectedthereto. Fig. 2 is a partial end view of the box, showing the connectionat the right of Fig. 1. Fig. 3 is a similar view showing the other styleof connection at the left of Fig. 1; and Figs. 4 and 5 are sectionalviews of conduit-pipes, illustrating the mansame time anoutwardly-projecting shoulder ner of forming the ends thereof.

I dispense with the use of bushings by forming the inner faces of thesplit connecting- I necks with internal threads or like projections toengage with threads or other projec- I tions on the ends of the pipes.

Instead of making the body of the outlet- 1 box split, I prefer to makethe body with' solid side Walls, having openings, but with eachconnecting-neck separately split, as will i In 5 be seen on reference toFigs. 1, 2, and 3. these figures, A represents the body of the box,which has any suitable number of outwardly-projecting necks B B, towhich the ends of the conduit-pipes C O are to be connected. One half(the lower half) of each neck is formed integral with the body A, whilethe other and upper half is a separate detachable stirrup. At the rightof Fig. 1 and in Fig. 2 the lower part of the neck is shown as asemicylindrical neck I) with lugs 6 6, all formed integral, as bycasting with Serial No. 58,638. (No model.)

the neck the box has an annular stop-shoulder 8 with a flaring innerface 9.

Instead of making the two parts of the outwardly-projecting necks truesemicylinders, substantially concentric with the pipe 0, as shown inFig. 2, they may be made of a larger curve, as shown at B in Fig. 3, andformed with projections or shoulders 10 to engage shoulders formed onthe end of the pipe 0. These shoulders can conveniently be formed byflaring out the open end of the pipe, as seen more clearly at 11 in Fig.5. This construction at the same time enables me to get rid of a commonfeature of objection illustrated in Fig. 4, which shows how the cuttingof a pipe length at X forms and leaves a sharp inwardly-proj ecting edgeat 00, liable to chafe and cut the wire insulation. By flaringthe end ofthe pipe outward by any suitable tool to the form illustrated in Fig. 5this sharp inner edge is removed and at the formed for coupling up thepipe end with an outlet-box or other part, as illustrated at the left ofFig. 1 and in Fig.3.

In either of the forms of connection shown a pipe can be connected up ordisconnected by simple attachment or removal of the stirrup' withoutdisturbing anyof the other connections to the box. I

I claim as my'invention 1. An electrical conduit-box with a splitconnecting-neck formed with internal projections in combination with thepipe end having external projections to engage therewith, the box havingan internal stop-shoulder at the inner end of the connecting-neck.

2. An electrical conduit box with a split connecting-neck internallythreaded in combination with the pipe end correspondingly threadedexternally, the box having an internal shoulder at the inner end of theconmeeting-neck.

3. An electrical condnitbox with a split connecting-neck internallythreaded, the box being formed with an inwardly-flaring internalshoulder at the inner end of the neck.

at. The combination of an electrical con-- formed on the body and theother separate therefrom, and means for securing the two parts together.

5. An electrical ou tlet-box having connecting-necks, each in two parts,one formed integral with the body of the box and the other a separatepiece.

I 6. An electrical outlet-box having connecting-necks, each in twoparts, one formed integral with the body of the box and the other aseparate piece, and the two parts having internal projections to engagewith the pipe end.

'7. An electrical outlet-box having a conmeeting-neck in two parts withside flanges or lugs, one part being formed integral with the body ofthe box and the other a separate piece, and adapted to be secured to thepart on the body by means of the lugs.

8. An electrical conduit-box having a solid side wall with an openingand a se'niicylindrical connecting-neck formed integral with the body ofthe box and means for securing the end of the pipe therein, the boxhaving at the inner end of the neck a shoulder flaring on the inside ofthe box.-

9. An electrical outlet-box having a conthe end of the pipe therein.

11. An electrical outlet-box having a solid side wall with an openingand a semicylindrical connecting-neck formed integral vwith the body ofthe box and means for securing the end of the pipe therein, the boxhaving at the inner end of the neck a shoulder, as and for-the purposedescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HUBERT KRANTZ.

Witnesses:

HUBERT HOWSAR, F. WARREN WRIGHT.

